一种新的四路激光跟踪坐标测量系统的基点标定方法

在激光跟踪三维坐标测量系统中,系统首先要经过标定,才可以进行实际测量。因此系统标定的准确度会直接影响系统最终测量准确度。为了提高标定准确度,提出一种新的标定方法,即利用直线法原理,在优化布局下,采用两路激光干涉仪测量出基点的三维坐标。仿真结果表明目标点相对于基点呈对称分布时,测得的基点坐标准确度比非对称分布时高6到7倍,并通过实验得出了在该优化布局下的基点坐标。

The Method of the Calibration of the Base Points in the Laser Tracking 3D Coordinates Measuring System

In the laser tracking 3D coordinates measuring system,the self-calibration should be made before measurement that would take effect mostly on the result.In order to enhance the calibration accuracy,a new method of calibrating the base points coordinates is proposed.Two laser interferometers were employed on the linear principle to measure the 3D coordinates of the base point.Furthermore the optimization distributions of the base points and the target points are analyzed.Simulation result shows that when the target points are distributed symmetrically relative to the base point,the measuring accuracy of the base point coordinates is 6 or 7 times higher than that is measured in asymmetry distribution.The base point coordinates are derived by the experiments.